External dimensions
(mm)
| d | 105 |
| D | 145 |
| B | 20 |
| γ(minimum) | 1.1 |
Rated speed min-1
grease
Open type
Z·ZZ-shaped
V·VV type | 4300 |
Open type
DU type
DDU type | — |
Bearing code
| Open type | 6921 |
| dust cover | ZZ |
Non contact
Sealed loop type | VV |
| Contact sealing loop type | — |
| Equipped with a stop ring groove | N |
| Equipped with a stop ring | NR |
Stop ring groove size(1)
(mm)
a
(maximum) | 3.3 |
b
(minimum) | 1.9 |
D1
(maximum) | 142.6 |
γo
(maximum) | 0.6 |
γN
(minimum) | 0.5 |
Installation size
(mm)
da
(maximum） | 116 |
Da
(maximum) | 138.5 |
γa
(maximum) | 1 |
Dx
(minimum) | 152 |
CY
(maximum) | 4.7 |
describe
Bearings are mainly used in industries such as construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electricity, and railways
